When you install Control
Manager 2.5/3.0, setup generates a new public key. If you set the security
level to high, the Control Manager agents registered to the original Control
Manager 2.5/3.0 server re-import the public key to register to the new
Control Manager server. Since, a new public key is available, agents cannot
match the original public key to the new one. The agents will not be able
to register to the Control Manager server. To restore the original settings,
reinstall all agents to re-register to the new Control Manager 2.5/3.0
server.